Pretty Little Liars: The Perfectionists has some new company. Today, Freeform announced Kelly Rutherford (pictured), Sydney Park, and Eli Brown have joined their Pretty Little Liars spinoff pilot.

The series “is set in the town of Beacon Heights where everything seems perfect, from their top-tier college to their overachieving residents. But nothing in Beacon Heights is as it appears to be. The stress of needing to be perfect leads to the town’s first murder. Behind every Perfectionist is a secret, a lie and a needed alibi.”

Today Freeform revealed the full cast for the drama pilot “Pretty Little Liars: The Perfectionists.” They join “Pretty Little Liars” stars Sasha Pieterse and Janel Parrish in the spinoff pilot, as well as previously announced Sofia Carson.

Completing the trio of ‘perfectionists,” along with Carson’s character of Ava, are Sydney Park (“The Walking Dead”) as Caitlin, and newcomer Eli Brown, who portrays Dylan. Caitlin is described as smart, driven and thrives under pressure. The perfect daughter of two perfect mothers, Caitlin has set her sights on following in her mother’s Senatorial footsteps. Dylan, a gifted cellist, grew up feeling judged in his small hometown and now feels the need to be the best in all of his endeavors. He is deeply committed to his two passions, his music and his boyfriend, Andrew.

Also joining the cast is Kelly Rutherford (“Gossip Girl”), who stars as Claire Hotchkiss. The matriarch of the Hotchkiss family, Claire (along with her husband) is the founder of Hotchkiss Industries and the respected Beacon Heights University. Claire believes perfection is attainable and is the person who pulls the strings behind the scenes to get what she wants. Hayley Erin (“General Hospital”) rounds out the cast in a mysterious, unnamed role.

“Pretty Little Liars: The Perfectionists,” is based on the popular book series “The Perfectionists,” written by Sara Shepard, who also penned the No. 1 New York Times bestselling book series “Pretty Little Liars.” Everything about the town of Beacon Heights seems perfect, from their top-tier college to their overachieving residents, but nothing in Beacon Heights is as it appears to be. The stress of needing to be perfect leads to the town’s first murder. Behind every Perfectionist is a secret, a lie and a needed alibi. “Pretty Little Liars: The Perfectionists” is produced by Alloy Entertainment and Long Lake Media in association with Warner Horizon Scripted Television. I. Marlene King (“Pretty Little Liars,” “Famous in Love”) wrote the pilot and serves as executive producer with Charlie Craig (“Pretty Little Liars,” “The 100”), Lisa Cochran-Neilan (“Pretty Little Liars,” “Famous in Love”), Leslie Morgenstein (“Pretty Little Liars,” “The Vampire Diaries”) and Gina Girolamo (“The 100,” “The Originals”).”